ci: consume Heart's canonical arcticpy install instead of a local copy

[Jammy2211]

Part of PyAutoLabs/PyAutoHeart#170. Consumer leg — blocked on PyAutoLabs/PyAutoHeart#171 merging first (see Merge order below).

The arcticpy install recipe had drifted into four shell copies across the CTI repos with no single owner. PyAutoHeart now owns it as a composite action; this repo drops its copy.

Changes

• .github/workflows/smoke_tests.yml passes arcticpy: true, so Heart's smoke-tests.yml runs install-arcticpy before this workspace's epilogue.
• .github/scripts/smoke_install.sh loses the recipe, keeping only what is genuinely workspace-specific (the chain install and the autonerves re-pin).
• AGENTS.md — the documented recipe corrected.

The coupling this removes

smoke_install.sh did not install setuptools, and the task that prompted this described it as one runner-image change from breaking. That framing isn't accurate: Heart's smoke-tests.yml runs pip install --upgrade pip setuptools wheel immediately before invoking the epilogue, so setuptools was present.

The real defect is weaker but still worth removing — the epilogue's correctness depended implicitly on a step in a different repository's workflow, with nothing on either side stating the dependency. Reordering or trimming that Heart step would have silently broken CTI smoke. The canonical action is self-contained, so the coupling is gone rather than merely documented.

AGENTS.md corrections

The recipe said "after numpy+cython" and omitted three things, each reproduced against a clean build of arcticpy 2.6:

• setuptools — a build dependency --no-build-isolation will not supply (it doesn't read arcticpy's build-system.requires). Without it: BackendUnavailable: Cannot import 'setuptools.build_meta'. Python 3.12+ venvs no longer ship setuptools.
• scipy and matplotlib — runtime imports of arcticpy/read_noise.py, which __init__.py imports. --no-deps suppresses them, so without them a successful build still fails at import arcticpy with ModuleNotFoundError.

Merge order

Heart's PR must land first — this branch's arcticpy: true is only meaningful once smoke-tests.yml on Heart's main accepts that input, and the action must exist there. Expect smoke CI here to fail until then.

Verification

smoke_install.sh passes bash -n; smoke_tests.yml parses as YAML. The end-to-end proof of the recipe itself (clean-container build, negative case, and a CTI trail with charge conserved) is in PyAutoLabs/PyAutoHeart#171, which owns the recipe now.

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